Now showing items 1-20 of 1083

    • Mapping galaxy evolution at multiple wavelengths and cosmic epochs 

      Cochrane, Rachel K. (The University of Edinburgh, 2019-12-12)
      Some of the most fundamental measurements we can make of the Universe are where and when stars formed in galaxies. In recent years, astronomers have converged on a picture in which the star formation rate density of the ...
    • Tidal evolution of dwarf spheroidal galaxies and dark matter subhalos 

      Errani, Raphaël (The University of Edinburgh, 2019-11-07)
      Understanding the distribution of dark matter (DM) on galactic scales is at the root of constraining the nature of DM and processes of galaxy formation like baryonic feedback. Dwarf spheroidal galaxies (dSphs), lying at ...
    • Impact of Baryonic astrophysics and intrinsic alignments on dark energy and neutrino constraints in cosmology 

      Copeland, David Nicholas (The University of Edinburgh, 2019-12-09)
      In the early 2020s, cosmology will enter an era of unprecedented precision when the next generation of large scale structure surveys begin receiving data. As a result, it is expected that stronger constraints on major ...
    • Determining the weak couplings |Vub| = |Vb| using semileptonic decays 

      Smith, Iwan Thomas (The University of Edinburgh, 2019-11-26)
      This thesis will present the first observation of the decay B s 0 →K − μ + ν μ and the determination of |V ub |/|V cb |. Using 2 fb −1 of data with a centre of mass energy √s = 8 TeV provided by the Large Hadron Collider ...
    • Evaluation-efficient multidimensional numerical integration 

      Tumolo, Greg Anthony (The University of Edinburgh, 2019-11-26)
      Pre-existing methods for multidimensional numerical integration tend to use many more evaluations of the integrand than necessary. That is, pre-existing methods are evaluation inefficient. In some applications of ...
    • Non-linear universe: the role of simulations, theory & machine learning in weak lensing cosmology 

      Giblin, Benjamin Martin (The University of Edinburgh, 2019-11-26)
      The coherent distortions in the observed shapes of distant galaxies, a consequence of the spacetime curvature induced by the intervening large-scale structure of the Universe, is an abundant reservoir of cosmological ...
    • Bacterial confinement in micro fluidic micro-environments 

      Taylor, Daniel (The University of Edinburgh, 2019-11-26)
      Microfluidic droplet systems have shown great promise in the study of biological systems. In this thesis I explore the application of a microfluidic droplet system to the study of small bacterial populations and their ...
    • Studying the growth of galaxies with JWST 

      Kemp, Thomas William (The University of Edinburgh, 2019-11-26)
      The James Webb Space Telescope (JWST or Webb) is a large (6.5m diameter primary mirror) infrared (0.6 < λ < 30μm) space telescope. It impressive size and wavelength coverage will revolutionise the field of galaxy formation ...
    • Influence of cosmology on long term star formation 

      Oh, Boon Kiat (The University of Edinburgh, 2019-11-26)
      This dissertation explores cosmological simulations of galaxy formation, focusing on the asymptotic efficiency of conversion of baryons into stars and asking how this quantity varies in different cosmological models. By ...
    • Star-formation histories of massive quiescent galaxies 

      Carnall, Adam Christopher (The University of Edinburgh, 2019-11-26)
      This thesis presents several related analyses designed to understand the star-formation histories (SFHs) and quenching mechanisms of massive quiescent galaxies across cosmic time. More generally, it contains research ...
    • Dark Matter and how to find it: a search for low-mass leptophobic Dark Matter mediators and the development of mass-decorrelated jet taggers with the ATLAS experiment 

      Søgaard, Andreas (The University of Edinburgh, 2019-11-26)
      A search for low-mass leptophobic Dark Matter (DM) mediator particles in 36 fb-1 of pp collision data at √s = 13 TeV collected by the ATLAS experiment is presented. The search is performed in final states where the mediator ...
    • Low-dimensional models of the transition to turbulence 

      Thomson, Stuart William (The University of Edinburgh, 2019-11-26)
      The transition to turbulence in shear flows such as pressure driven pipe flow or plane Couette flow presents an interesting theoretical problem: how do we understand the existence of chaos when the laminar flow is stable ...
    • On interacting particles in 1D and 2D 

      Hellier, Joshua Daniel Mason (The University of Edinburgh, 2019-11-26)
      Diffusion processes are pretty ubiquitous across the natural world, so it is important to try to understand them. A system in which diffusion is being driven by concentration differences between boundary reservoirs is a ...
    • Fluctuation and dissipation dynamics in the early universe 

      Mabillard, Joël (The University of Edinburgh, 2019-11-26)
      The aim of this thesis is to study the effects of fluctuation and dissipation dynamics in Early Universe cosmology. The formal description of the Early Universe relies on cosmological fields that, in general, are not ...
    • Growth of massive seed black holes and their impact on their host galaxies 

      Eastwood, Daniel Shaun (The University of Edinburgh, 2019-11-26)
      The recent discovery of an 800 million solar mass black hole powering a quasar at a redshift corresponding to 690 million years after the Big Bang is the latest in a growing list of observations of super-massive black ...
    • Search for Higgs boson pair production with the ATLAS detector at the Large Hadron Collider 

      Taylor, Alan James (The University of Edinburgh, 2019-11-26)
      Since the observation of a new particle consistent with the Standard Model Higgs boson by the ATLAS and CMS collaborations, a number of important measurements have been made to understand this new particle. For example, ...
    • Growth dynamics of E. coli in the presence of cell wall-targeting antibiotics 

      Brouwers, Rebecca (The University of Edinburgh, 2019-11-26)
      This thesis investigates the growth dynamics of Escherichia coli bacteria in the presence of cell wall-targeting antibiotics, using experiments and mathematical modelling in order to understand quantitatively how these ...
    • Quantum techniques for classical black holes 

      Nicholson, Isobel (The University of Edinburgh, 2019-11-26)
      Modern theoretical physics has benefited from a rapid growth in mathematical technology. In particular, technology developed in one field can be quickly adapted for use in another. Two key techniques developed for ...
    • Scattering studies of magnetism in non-centrosymmetric systems 

      Pásztorová, Jana (The University of Edinburgh, 2019-11-26)
      With there being a strong connection between the underlying structure of materials and their properties, understanding this inherent coupling will lead to more effcient materials. This thesis studies three non-centrosy ...
    • Emergent complexity of microbial communities in the planetary crust 

      Landenmark, Hanna Klara Emilia (The University of Edinburgh, 2019-11-26)
      Microbial communities are highly complex systems, yet are assembled from basic building blocks of some of the simplest organisms on Earth. We currently have ample information on many individual microbial taxa, but we ...